The difference between ultrasonic flowmeter and electromagnetic flowmeter performance of their respective characteristics

Ultrasonic flowmeter and electromagnetic flowmeter in the introduction, working principle, classification and working performance have what differentiation? 1. The concept of the ultrasonic flowmeter and electromagnetic flowmeter ultrasonic flowmeter is by measuring the fluid flow on ultrasound beam ( Or ultrasonic pulse) To measure the effect of flow meter. And electromagnetic flowmeter, ultrasonic flowmeter for instrument circulation channel is not set any impediments, unimpeded flow meter, is suitable for solving the problem of flow measurement difficulty of flow meter, especially in the big flow measurement has the outstanding advantages, it is developing rapidly in recent years the electromagnetic flowmeter is a kind of kind of flowmeter to measure according to Faraday's law of electromagnetic induction tube conducting medium volume flow sensing instrument, MCU embedded technology, digital excitation, at the same time in the electromagnetic flow meter adopting CAN field bus. 2. The working principle of ultrasonic flowmeter and electromagnetic flowmeter by the ultrasonic transducer ultrasonic flowmeter, electronic circuit and flow display and cumulative system of three parts. Ultrasonic transmitting transducer converts electrical energy into ultrasonic energy, and launch it to the flow in the body, the receiver, the received ultrasonic signal amplified by electronic circuit and converted to represent the flow of electrical supply display and integrating instrument for display and integrating. Thus to achieve the traffic detection and display. Ultrasonic flowmeter is used piezoelectric transducer. It USES the piezoelectric effect of piezoelectric materials, using the optimal transmission circuit of add electricity to the transmitting transducer on the piezoelectric element, make its produce ultrasonic vibration. Ultrasonic to spread into the fluid in a certain Angle, and the receiving transducer, and the piezoelectric element into electrical energy, in order to detect. Transmitting transducer using the converse piezoelectric effect of piezoelectric element, and the receiving transducer is using the piezoelectric effect. The working principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. In the electromagnetic flowmeter, the measuring tube conductive medium is equivalent to conducting metal rods in the Faraday experiment, up and down at the ends of the two electromagnetic coils generate constant magnetic field. When conducting medium flows, the induced voltage is produced. The inside of the pipe induced voltage produced two electrodes are measured. Measuring pipeline through non-conductive lining ( Rubber, teflon, etc. ) With fluid and measuring electrode electromagnetic isolation. Electrical conductivity of liquid flow in the perpendicular to the magnetic field of magnetic measurement tube, in a direction perpendicular to the direction of flow and flow rate is proportional to the induced potential, the direction of the electromotive force by & other; For right hand rules & throughout; 。 3. The classification of the ultrasonic flowmeter and electromagnetic flowmeter based on detection, can be divided into velocity difference method, doppler method, beam deflection method, noise and the relevant laws such as different types of ultrasonic flowmeter. According to the principle of signal detection, the ultrasonic flowmeter can be roughly velocity difference method ( Including: direct time difference method, the time difference, phase difference, frequency difference method) Beam deflection method, doppler method, correlation method, such as spatial filtering and noise type. With noise ZUI method principle and the structure is simple, easy to measure and carry, cheap but low accuracy, suitable for use in the occasion of the flow measurement accuracy requirements is not high. Due to time difference method, the direct method of time difference, frequency difference method and the basic principle of phase difference method by measuring ultrasonic pulse transmit time downstream and upstream speed to reflect the difference between the flow velocity of the fluid, so it is also referred to as propagation velocity difference method. The frequency offset and time difference method overcomes the sound velocity vary with fluid temperature, the error of accuracy is higher, so widely used. According to the configuration method of transducer, speed difference set is divided into: Z method ( Through the method) , V, Reflection method) , X ( Hand in again) And so on. Electromagnetic flowmeter divided according to the exciting current mode, a dc excitation, communication ( Power frequency and other frequency) Excitation, low-frequency rectangular wave excitation and double rectangular wave excitation; According to the output signal connection and excitation ( Or power supply) The attachment of pattern classification, there are four wire and two wire; Classification in the converter and the sensor assembly way, there are points in shape and size: according to the flow sensor and pipeline connection mode classification, flange type, clamping, health, insert type screw thread connection. According to the classification of flow sensor electrode is in contact with the liquid to be tested, there is contact type and non-contact type classification, according to the flow sensor structure has short tube type and insertion type ( Plug-in electromagnetic flowmeter) ; Classification according to the use, has a generic type, explosion-proof type, health, prevent contamination of water and is used for open channel flow measurement type diving ( Open channel flow meter) 。 4. The primary difference between ultrasonic flowmeter and electromagnetic flowmeter 4. 1 medium different ultrasonic flowmeter of the flow measurement accuracy is almost not affected by measurement of body temperature, the effects of parameters such as pressure, viscosity, density, and can be made into non-contact and portable measuring instrument, it can solve the other type is difficult to measure by instrument of strong corrosion resistance, electrical conductivity, radioactive and flammable and explosive medium flow measurement problem. Low electromagnetic flowmeter can measure the conductivity of liquid, such as stone oil products and organic solvents etc. Universal electromagnetic flowmeter because the lining material limit, cannot be measured high temperature liquid. Electromagnetic flowmeter is determined by measuring the speed of the conductive liquid volume flow of work condition. According to the measurement requirements, for the liquid medium, should measure the mass flow rate, fluid density measurement should involve the medium flow, different media have different density, and temperature changes. Without considering fluid density, electromagnetic flow meter transducer not only gives the volume flow under normal temperature condition is inappropriate.

The use and installation of mass flow meter is compared with most other systems for managing the tuning fork liquid density meter effectively and no doubt mass flow meter have won the race so many times.

Looking for a company to handle your mass flow meter digital fork density meter? Visit Sincerity Flow Meter today for more information.

mass flow meter developed from Beijing Sincerity Automatic Equipment Co., Ltd’s unique skills in high technology has helped to produce mass flow metercoriolis mass flow meter emerson.

Loyalty programs provide an opportunity to learn the preferences of customers and design communication strategies that will resonate with mass flow meter.

With so many suggestions and tips on diferent solutions to vortex flow meter manufacturer issues, it is truly important to know how to find the most appropriate mass flow meter at economical price.